Launch warning times.

[Matt Wiser]

Oh, there'd be enough SSNs around to trail any boomers headed to their East Coast or West Coast patrol stations. And kill them.

Not to mention that the USN and RN boomers were never tracked, according to both navies. The first sign of a USN or RN boomer's location is when the missile-warning radars pick up the missiles coming from mid-ocean.